SA58631 NXP Semiconductors, SA58631 Datasheet - Page 4

• Manufacturer Part Number: SA58631
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
SA58631_2
Product data sheet
7.2 Pin description
8.1 Power amplifier
8.2 Mode select pin (MODE)
Table 3.
The SA58631 is a single-channel BTL audio amplifier capable of delivering 3 W output
power to an 8
the device can be switched to standby and mute condition. The device is protected by an
internal thermal shutdown protection mechanism. The gain can be set within a range of
6 dB to 30 dB by external feedback resistors.
The power amplifier is a Bridge Tied Load (BTL) amplifier with a complementary
PNP-NPN output stage. The voltage loss on the positive supply line is the saturation
voltage of a PNP power transistor, on the negative side the saturation voltage of an NPN
power transistor. The total voltage loss is < 1 V. With a supply voltage of 9 V and an 8
loudspeaker, an output power of 3 W can be delivered to the load.
The device is in Standby mode (with a very low current consumption) if the voltage at the
MODE pin is greater than V
range between 1.5 V and V
condition is useful to suppress plop noise at the output, caused by charging of the input
capacitor.
Symbol
MODE
SVR
IN+
IN
OUT
V
GND
OUT+
CC
Pin description
load at THD+N = 10 % using a 9 V power supply. Using the MODE pin,
Pin
1
2
3
4
5
6
7
8
Rev. 02 — 12 October 2007
CC
CC
Description
operating mode select (standby, mute, operating)
half supply voltage, decoupling ripple rejection
positive input
negative input
negative output terminal
supply voltage
ground
positive output terminal
1.5 V the amplifier is in a mute condition. The mute
0.5 V, or if this pin is floating. At a MODE voltage in the
3 W BTL audio amplifier
SA58631
© NXP B.V. 2007. All rights reserved.
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